package com.imooc.web.controller;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Date;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.io.IOUtils;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;

import com.imooc.dto.FileInfo;

/**
 * 3.9.2 创建文件控制器类
 * @author qilongfei
 *
 */
@RestController
@RequestMapping("/file")
public class FileController {

	private String folder = "C:/Users/Administrator/workspace/imooc-security/imooc-security-demo/src/main/java/com/imooc/web/controller";

	/**
	 * 3.9.4 上传文件controller
	 * @param file
	 * @return
	 * @throws Exception
	 */
	@PostMapping
	public FileInfo upload(MultipartFile file) throws Exception{
		System.out.println(file.getName());
		System.out.println(file.getOriginalFilename());
		System.out.println(file.getSize());
		
		File localFile = new File(folder, new Date().getTime()+".txt");
		file.transferTo(localFile);
		
		return new FileInfo(localFile.getAbsolutePath());
	}
	
	/**
	 * 3.9.5 下载文件controller
	 * @throws IOException 
	 * @throws FileNotFoundException 
	 */
	@GetMapping("/{id}")
	public void download(@PathVariable String id,HttpServletRequest request, HttpServletResponse response) throws Exception{
		// jdk7的写法
		/*try {
			InputStream inputStream = new FileInputStream(new File(folder,id+".txt"));
			OutputStream outputStream = response.getOutputStream();
		} catch (Exception e) {
		}*/
		try(InputStream inputStream = new FileInputStream(new File(folder,id+".txt"));
				OutputStream outputStream = response.getOutputStream();) {
			response.setContentType("application/x-download");
			response.addHeader("Content-Disposition","attachment;filename=test.txt");
			IOUtils.copy(inputStream, outputStream);
			outputStream.flush();
		}
	}
}
